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Hatshy [7]
3 years ago
10

Can someone solve under section two, numbers one and two?

Physics
2 answers:
Novay_Z [31]3 years ago
8 0

1. Height of cube =9cm

mass of cube= 3645 g

volume= length ×breadth× height

as cubic volume so length breadth and heights are same so

volume =height ×height ×height

V =9cm×9cm×9cm= 729cm³

density =mass/ volume

density =3645g/729cm³

density= 5g/cm³

2.  AS DENSITY = mass/volume

volume =mass/ desity

volume= 13.558g/(0.089g/l)

volume= 0.152L³

ser-zykov [4K]3 years ago
3 0

Density = mass/volume

#1). The mass is given. And knowing the length of a cube's side, you can calculate its volume.

Volume = mass/density

#2). The mass and density are both given.

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If an automobile engine delivers a power of 50.0 hp, how much time will it take for the engine to do 6.40 x 10^4 j of work? (1 h
aleksandrvk [35]

Given data

Power (P) = 50 hp,

                = 50 × 746,  we know that 1 hp = 746 W.

                = 37300 Watts      (Watt = J/s)  

Work  = 6.40 ×10⁴ J

Power is defined as rate of doing work and the unit of power is<em> Watt.</em>

Mathematically,

         Power = (Work / time)   Watts

                     = 6.40 ×10⁴ / time

          37300 W = 6.40 ×10⁴ J /time      (Where time in seconds)

         => time = Work/Power

                      = 6.40 ×10⁴/37300

                      = <em>1.74 seconds  </em>

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<em> </em>


7 0
3 years ago
2. How is frequency described in mathematical terms?
alexdok [17]

Answer:

Explanation:

Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second. In this case, there is 1 cycle per 2 seconds. So the frequency is 1 cycles/2 s = 0.5 Hz.

4 0
3 years ago
Read 2 more answers
What's the real power of a purely resistive circuit in which the RMS voltage measures 80 volts and the RMS current measures 5 am
Nat2105 [25]

Answer:

D.400 watt

Explanation:

  • B/c <em>Pave</em><em>=</em><em>Irms</em><em>Vrms</em>
  • <em>Pave</em><em>=</em><em>(</em><em>5</em><em>)</em><em>(</em><em>8</em><em>0</em><em>)</em>
  • <em>Pave</em><em>=</em><em>4</em><em>0</em><em>0</em><em> </em><em>watt</em>

<em>where</em><em> </em><em>Pave</em><em> </em><em>=</em><em> </em><em>average</em><em> </em><em>power</em><em> </em>

<em>Irms</em><em>=</em><em>RMS</em><em> </em><em>current</em><em> </em><em>&</em>

<em>Vrms</em><em>=</em><em>RMS</em><em> </em><em>voltage</em>

7 0
1 year ago
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